Attachable beverage coaster



FIG. 1 is a perspective view of an attachable beverage coaster showing our new design, the broken lines showing the glass are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a right side view, the left hand view being a mirror image thereof; and,

FIG. 6 is a bottom view. 

The ornamental design for a attachable beverage coaster, as shown and described. 